package com.example.test2018131425;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
        String reqPath = httpServletRequest.getServletPath();
//        只有返回true才会继续向下执行，返回false取消当前请求
        HttpSession session = httpServletRequest.getSession();
        if (session == null||session.getAttribute("user") == null){
//            log.trace("access#{},not logged in,return",reqPath);
            httpServletResponse.sendRedirect("/login");
            return false;
        }
        return true;
    }
    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception{

    }
    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest,HttpServletResponse httpServletResponse,Object o,Exception e) throws Exception{

    }
}
